Monaro Rears

[baptist]

Has anyone successfully fitted a 255 section rear tyre on the VXR without any modifications and any ill effect?

[after_shock]

baptist said:

Has anyone successfully fitted a 255 section rear tyre on the VXR without any modifications and any ill effect?

Im running 255/35/19's now on the VXR alloys, std suspension and no problems to talk of just more grip

[baptist]

Thats good news, only thing that i dont like about the car is the skinny tyres on the back of it!

Do they look right on the rims, which are what 8" wide?

[after_shock]

They look fine, do stick out a touch but it is only a touch, can get you some pics at the weekend if you want to see them.

Cant remember the width of the wheels off the top of my head!

[monkfish1]

You really need to be careful here. You should be checking that you have proper clearance (say 5mm) on full bump. The only way to properly check this is to remove the springs and lower the car onto the bumpstops. If it clears all is well, if it doesn't you will likely find out when going through a subsidence dip on a motorway at high speed!!! the result of tyre v wheelarch is obvious.

The rear of a stock monaro is tight, really tight.

[baptist]

Right, thanks for that Mr M.Fish.

Maybe not worth the risk then!

[monkfish1]

If my memory serves me, on a stock VXR that i measured on full bump with standard tyres the clearance to the outer arch was 8mm, but that will vary dependant on camber and subframe placement. Go up 10mm on tyre and thats 5mm each side. Now down to 3mm. Dont forget you need a working clearance for cornering etc.

[wallsjay]

could you push a 265 on there would u think ? i am thinking more the tyre wheel and not the body issues here

[gsd2000]

If you trip the inner lip to the spot welds how much extra room can be gained?

How much extra negative chamber can you run on the rear without wearing the tyres down too quick?

If both of the above were done how much extra room could be gained?

[monkfish1]

gsd2000 said:

If you trip the inner lip to the spot welds how much extra room can be gained?

How much extra negative chamber can you run on the rear without wearing the tyres down too quick?

If both of the above were done how much extra room could be gained?

You dont want more negative camber! You are already at 1.5 degress-ish. If you do you will lose straight line grip anyway.

The extra you gain will be however much you chop off! the contact area is towards the rear of the arch, where the factory have already slimmed the arch lip down. but in answer to your question, probably not enough to counter an 8mm offset inaccuracy and have a working clearance.

However, if you fit some pedder camber/toe adjusting bushes and spin them round you could find another 2-3mm on top of what you gain with the angle grinder.

[gsd2000]

Will the pedders bushes stiffen the rear end up enough to reduce sideways travel?

[monkfish1]

gsd2000 said:

Will the pedders bushes stiffen the rear end up enough to reduce sideways travel?

a little, but you want the Pedders Rear End Pack to stop the subframe floating about. The bushes i referred to earlier are the trailing arm ones.

[gsd2000]

i will ring you tomorrow, i may get away with not having to roll the rears.

[monkfish1]

gsd2000 said:

i will ring you tomorrow, i may get away with not having to roll the rears.

No problem. Its all stuff we keep in stock

[S800VXR]

Each car varies but if you go aftermarket rims then 10" rims with a 45 offset will go in. I think 9.5 will also go in with the associated offset adjustment and just a tickle off the arch lip. 10" needs a full roll to clear with 5mm clearence inside and outside on full compression.